Combined water heater and heat deflector attachment for furnaces



23, 1937. R, $TURG|5 2,074,948-

COMBINED WATER HEATER AND HEAT DEFLECTOR ATTACHMENT FOR FURNACES Filed Aug. 29, 1955 2SheetsSheet l March 23, 1937. STURG|$ 2,074,948

COMBINED WATER HEATER AND HEAT DEFLECTOR ATTACHMENT FOR FURNACES Filed Aug. 29, 1935 2 Sheets-Sheet 2 Patented Mar. 23, 1937 UNITED STATES PATENT QFFICE COMBINED WATER HEATER AND HEAT DEFLECTOR ATTACHMENT FOR FUR- NACES 11 Claims.

The invention disclosed herein is of the general type shown in application for patent filed by Raymond F. Sturgis, for a Combined Water heater and heat deflector attachment for furnaces,

filed May 8, 1935, Serial No. 20,459 and embodies improvements in the art thereover.

While the water heater attachment may constitute an element of a new furnace construction, the same is primarily designed for use with furnaces that are converted from the burning of coal or like fuel to the burning of oil or gas and an important object of the invention is to construct the water heater of sections to facilitate placement thereof into the interior of the furnace through the usual fire door opening with the sections assembled in a water-tight manner to prevent leakage and positioned for the maximum absorption of heat emanating from a burner.

A further object of the invention is to provide a water heater attachment for furnaces of the foregoing character wherein the attachment in the form of an auxiliary water heater is arranged centrally within the furnace and adjacent the lower end of the water back with a pipe connection between the water jacket and auxiliary water heater operative for transferring or directing the flow of water from the lower end of the water jacket into the auxiliary heater and further operative as a. syphon for draining water from the auxiliary water heater when the fluid system of the furnace is drained. A further and important object of the invention is to provide a water heater of the foregoing character formed of semi-circular channel members with the inner and outer walls thereof crenelated to increase radiation with the two sections of the heater joined together to form a watertight connection therebetween and for placing the two sections in communication with each other.

With the above and other objects in view that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of 5 parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings:-

Figure 1 is a vertical sectional view of a furnace equipped with the water heater attachment and 50 showing the pipe forming supply and syphonic communication between the water jacket of the furnace and the attachment;

Figure 2 is a horizontal sectional view taken on line 2-2 of Figure 1, showing the refractories lo- 55 cated above the water heater attachment for directing the heating units onto the walls of the water jacket;

Figure 3 is a horizontal sectional view taken on line 3-3 of Figure 1, showing the spacer refractories for centering the water heater attachment within the body of the furnace and the sectional form of attachment heater;

Figure 4 is a horizontal sectional view of the auxiliary water heater attachment showing the' pivotal connection between the two sections forming the same;

Figure 5 is a bottom plan view of the auxiliary water heater attachment showing the crenelated inner and outer walls thereof, heating fins and; heat passages therethrough;

Figure 6 is an enlarged fragmentary sectional view showing the water tight ground connection between the two sections of the auxiliary water heater; and

Figure '7 is a vertical sectional view of a furnace structure, similar to Figure 1, showing the water supply pipe for the auxiliary water heater entering the bottom of the latter and in communication with the return pipe of the water or;

steam heating system.

The furnace construction as disclosed in Figures 1 and 7 may be of the type employed in either hot water or steam heating systems, the furnace embodying a casing I 0 having a water jacket H defined by an inner wall 52, the furnace further embodying a hot water head or steam dome I3 and a supporting base Hi. The wall of the furnace is provided with the usual fire door opening I5, a flue door opening it and a cleanout door opening I! as shown in Figure '7. The heater [8 for the furnace that may be either of the gas or oil type is confined within the supporting base l4, although the same may be mounted in the lower end of the body Ill and is in open communication with the interior of the furnace. The furnace l0 further includes staggered water sections or legs l9 adjacent the upper end thereof and an outlet flue 2!! for products of combustion. Water or steam delivery pipes 2| extend from the furnace head l3 to heating units, such as radiators or the like and the condensation or water is returned from the heating unit through the water jacket H by way of the return pipe 22 that has a drain valve 23 at its lower end for the complete drainage of the heating system and furnace.

The auxiliary water heater attachment is formed of two sections 24 and 25 of channel formation and semi-circular, although it is to be understood that the same may be rectangular in shape or in any form desired with the inner and outer walls thereof corrugated or waved to increase radiating surfaces thereof. The auxiliary heater is formed of sections to facilitate introduc- 5 tion thereof into the furnace through the fire door opening l5. A pair of adjacent ends of the sections 24 and 25 of the auxiliary heater are closed as at 26 for abutting contact with each other when the sections are assembled and the other ends of the two sections have inter-fitting overlapping parts that are joined together in a water-tight manner to establish communication between the two sections. As shown in Figure 5, a tongue and groove connection 21 is formed at the abutment walls 28.

The connection forming the communication between the two sections is shown'more clearly in Figure 6, the section 24 carrying an extension 28 at its lower end and the section 25 carrying an 20 extension 29 at its upper end, the sections 28 and 29 overlapping and each including a wall 38 for engagement when the extensions are assembled. Registering openings are formed in the walls 30 of the extension for the reception of a 25 ground tubular seat 3| on which sections of the walls 28 and 29 center and engage and to effect a water-tight connection between the sections,

lugs 32 and 33 project laterally and inwardly of the extensions 28 and 29 respectively at opposite sides of the tubular seat 3| for the passage of a tie bolt 34. The lower end of the tie bolt 34 is threaded as at 35 to the lug 32 while the upper headed end 36 of the tie bolt engages the upper side of the lug 33. To facilitate placement of the 35 tie bolt 34, an opening is provided in the extension 29 of the section 25 in line with the lugs 32 and 33 for the passage of a tool for the manipulation of the tie bolt 34, the opening in the extension 29 being closed by the screw plug 31.

From an inspection of Figure 6, it will be observed that water may freely flow through the tie bolt connected ends of the sections 24 and 25 and the ground seat 3| with which the extensions 28 and 29 are engageable to provide a water-tight connection.

The assembled sections 24 and 25 of the auxiliary Water heater are centered within the furnace III by means of the refractory blocks 38 seated in ribbed pockets 39 carried by the outer sides of the sections 24 and 25. The sections 24 and 25 when assembled provide a vertical passage therethrough for products of combustion, such opening being designated by the reference char- 55 'acter 40 and said sections are designed to provide an annular channel 4| at their upper ends with heat passage openings 42 extending therethrough.

'Inwardly directed radiating shells 43 are carried by the inner walls of the sections 24 and 25 to in- 60 crease the heat radiating surfaces thereof.

A heat deflector in the form of sectional refractory plates 44 is supported above the auxiliary water heater by means of pins or supports 45 rising from the heater as shown in Figures 1 and 3 65 and said deflector is so dimensioned relative to the auxiliary water heater and furnace H] to direct heat units and products of combustion rising through the central opening 4|] laterally onto the inner wall l2 of the water jacket I.

7 Communication between the auxiliary water heater and water jacket I I includes a pipe 46 rising from the upper end of the auxiliary water heater and connected to the latter by branch pipes 41 with the upper end of the pipe 46 later- 75 ally directed between the water legs l9 for passage through the clean-out opening l6 for reentry as at 48 into the furnace header l3. Another pipe 49 of substantially inverted U-shape has one leg 50 thereof connected to branch pipes 5| that pass downwardly through the refractory plates 44 and top wall of the auxiliary water heater to terminate adjacent the bottom wall of the latter as shown in Figure 1. The other leg 52 of the pipe 49 passes downwardly through the sill of the fire door opening |5 for entering the water jacket II with the lower end thereof terminating at a point below the lower ends of the branch pipes 5| within the auxiliary water heater. By such arrangement, the entire water system of the furnace may be drained when desired with the auxiliary water heater drained by syphonic action of the pipe 49.

In operation, the water in the auxiliary water heater is super-heated and delivered therefrom by way of the pipe 48 to the header 3 of the furnace with steam or hot water passing through the pipes 2| to heating elements, the return of condensation and water to the furnace being by way of the return pipe 22 that enters the lower end of the water jacket I as shown in Figure 1. The sectional construction of the auxiliary water heater facilitates placement thereof into the body of the furnace and the ground joints between the two sections of the auxiliary water heater permits a free circulation of water in the two sections with leakage thereof prevented.

The form of invention illustrated in Figure 7 is similar to the invention as shown in Figures 1 to 6 except that the return of condensation or Water through the system to the furnace is directed by the pipe 52w that forms communication between the return pipe 22 and the lower end of the auxiliary water heater.

From the above detailed description of the invention, it is believed that the construction and.

operation thereof will at once be apparent and while there are herein shown and described the preferred embodiments of the invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

I claim:

1. In a combined water heater and heat deflector attachment for furnaces, a furnace having a water jacket, a water heater in the furnace adjacent the lower end of the water jacket and having a central opening therein, U-shaped supports at the outer sides of the water heater and blocks in the supports engaged with the water jacket to space the heater from the jack necting the extensions in spaced relation to the walls thereof and located entirely within the heater and means forming communication between the water heater and water jacket.

2. In a combined water heater and heat deflector attachment for furnaces, a furnace having a water jacket, a water heater in the furnace adjacent the lower end of the water jack et and having a central opening therein, U- shaped supports at the outer sides of the water heater and blocks in the supports engaged with the water jacket to space the heater from the jacket, the water heater being formed of channel sections with abutting closure walls at two ends thereof and a communicating ground joint connection at the other ends of the sections including stepped overlapping extensions, a tubular ground seat in the extensions, a pair of alined lugs respectively carried by the extensions at opposite sides of the ground seat, a tie bolt connecting the lugs and passing through the ground seat in spaced relation thereto and located entirely within the heater and means forming communication between the water heater and Water jacket.

3. A water heater attachment for furnaces comprising channel sections with abutting closure walls at two ends thereof and a communicating ground joint connection at the other ends of the sections including stepped overlapping extensions, a tubular ground seat in the extensions, a pair of alined lugs respectively carried by the extensions at opposite sides of the ground seat, a tie bolt connecting the lugs and passing through the ground seat, in spaced relation thereto and located entirely within the heater, and one of the extensions having a plug closed opening therein facilitating access to the tie bolt.

4. A water heater attachment for furnaces comprising channel sections with abutting closure walls at two ends thereof and a communicating ground joint connection at the other ends of the sections including stepped overlapping extensions, a tie bolt connecting the extensions in spaced relation to the walls thereof, and located entirely Within the heater, heat radiating fins carried by the inner walls of the heater and a heat deflecting refractory disposed above the heater.

5. A water heater attachment for furnaces comprising channel sections with abutting closure walls at two ends thereof and a communieating ground joint connection at the other ends of the sections including overlapping extensions, a tubular ground seat in the extensions, a pair of alined lugs respectively carried by the extensions at opposite sides of the ground seat, a tie bolt connecting the lugs and passing through the ground seat and in spaced relation thereto and located entirely within the heater, heat radiating fins carried by the inner walls of the heater and a heat deflecting refractory disposed above the heater.

6. A water heater attachment for furnaces comprising channel sections with abutting closure walls at two ends thereof and a communicating ground joint connection at the other ends of the sections including overlapping extensions, a tubular ground seat in the extensions, a pair of alined lugs respectively carried by the extensions at opposite sides of the ground seat, a tie bolt connecting the lugs and passing through the ground seat, in spaced relation thereto and located entirely within the heater, one of the extensions having a plug closed opening therein facilitating access to the tie bolt, heat radiating fins carried by the inner walls of the heater and a heat deflecting refractory disposed above the heater.

'7. In a combined water heater and heat deflector attachment for furnaces, a furnace having a water jacket, a water heater in the furnace adjacent the lower end of the water jacket and spaced therefrom and having a central opening therein, the water heater being formed of channel sections with abutting closure walls at two ends thereof and a communicating ground joint connection at the other ends of the sections in-.

cluding overlapping extensions, a tie bolt connecting the extensions in spaced relation to the walls thereof, means forming communication between the water heater and water jacket, heat radiating fins carried by the inner Walls of the heater, a heat deflecting refractory disposed above the heater, including a pipe extending upwardly from the heater through the furnace and opening into the upper end of the water jacket, an inverted U-shaped pipe having one leg extending downwardly through the upper end of the heater and terminating adjacent the lower end thereof and the other leg extending downwardly into the water jacket and terminating in a plane below the plane of the lower end of the first leg whereby the water heater may be syphonically drained.

8. In a combined water heater and heat deflector attachment for furnaces, a furnace having a water jacket, a water heater in, the furnace adjacent the lower end of the water jacket and spaced therefrom and having a central opening therein, the water heater being formed of channel sections with abutting closure walls at two ends thereof, and a communicating ground joint connection at the other ends of the sections including overlapping extensions, a tubular ground seat in the extensions, a pair of alined lugs respectively carried by the extensions at opposite sides of the ground seat, a tie bolt connecting the lugs and passing through the ground seat and means forming communication between the water heater and water jacket, heat radiating fins carried by the inner walls of the heater and a heat deflecting refractory disposed above the heater including a pipe extending upwardly from the heater through the furnace and opening into the upper end of the water jacket, an inverted U-shaped pipe having one leg extending downwardly through the upper end of the heater and terminating adjacent the lower end thereof and the other leg extending downwardly into the water jacket and terminating in a plane below the plane of the lower end of the first leg whereby the water heater may be syphonically drained.

9. A water heater attachment for furnaces comprising channel sections hinged together at two ends, the other ends of the sections being closed and disposed in abutting engagement, the hinge connection including overlapping extensions and a tie-bolt constituting the hinge pivot and located entirely within the channel sections.

10. A water heater attachment for furnaces comprising channel sections hinged together at two ends, the other ends of the sections being closed and disposed in abutting engagement, the hinge connection including a tubular ground joint and a tie bolt extending through the joint and disposed entirely within the channel sections.

11. A water heater attachment for furnaces comprising channel sections hinged together at two ends, the other ends of the sections being closed and disposed in abutting engagement, the hinge connection including a tubular ground joint, a lug on each section at opposite sides of the ground joint and a tie bolt extending through the tubular joint and anchored to the lugs and disposed entirely within the channel sections.

RAYMOND F. STURGIS. 

